Shuttle and feeder driving mechanism for sewing-machines.



No. 856,531. H 'PATENTED JUNEll. 1907. H. KGHLER.

I SHUTTLE AND FEEDER DRIVING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED NOV. 98.19%.

4 SHEETS-SHEET 1.

PATBNTED JUNE 11, 1907.

H. KUHLER.

SHUTTLE AND FEEDER DRIVING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED NOV. 28.1906.

4 SHBETSBHEBT 2.

THB'NoRms PETERS co wasmunrau. ac

No. 856,531; PATENTED JUNE 11, 1907. H. KGHLER.

SHUTTLE AND FEEDER DRIVING MECHANISM FOR SEWING MACHINES APPLICATION IIEED NOV. 28.1906.

4 SHEETS-SHEET 3.

m: NORRIS PETERS ca, WASHINGTON. o. c.

PAIENTED JUNE 11, 1907.

H. KNHLER. SHUTTLE AND FEEDER DRIVING MECHANISM FOR SEWING MAGHINES.

APPLIUATION FILED NOV. 28,1906.

UNITED STATES PATENT OFFICE.

HERMANN KOHLER, OF ALTENBURG, GERMANY.

SH'UTTLE AND FEEDER DRIVING MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented June-11, 1907.

Application filed-November 28, 1906. Serial No. 345,499.

Altenburg, Empire of Germany, have invented' a new and useful Shuttle and Feeder Driving% Mecl1anism for Sewin -Machines, of which the followin is a specification.

My invention relates to improvements-in sewing machines, in which the needle-bar operating shaft above is made to drive the shuttle operating shaft below in the same direction toward' the 0 erator and at a varying speed, the former sliaft being provided with a crank and-with an eccentric set at an angle of l80 thereto and the latter shaft being driven fromthe crank above by means of a connecting-rod and a slotted crank, a twoarmed lever rocking on a stationary pin being employed'andadapted to be actuated at its upper fo'rked-end by the eccentric and to guidejwith-"its lower arm an intermediate point on'the connecting rod.

The ob'ects of my improvement are, first, to "omit t e eccentric from the upper shaft, second, -to shorten and to longitudinally slot the connecting rod and to arrange it for drivin anintermediate shaft by means of a slotte; 'cra'nkya stationary pin being employed for-engaging in the longitudinal slot of the connecting rod and guiding the latter, third,

.to provide on the intermedlate shaft a crank,

fourth, to provide'a second longitudinally sl'otted connecting rod, which is pivotally connected' with the crank on the intermediate shaft and is-made to drive the shuttle operating-shaft below-by means of a slotted crankj'it rocking about and sliding on an intermediate" stationary pin, and fifth, to provide a cam on' the intermediate shaft for driving'thefeeder operating shaft by means of a forked lever and-an adjusting lever.

I att ain these objects by the mechanism illustrated in the accompanying drawing, in which Figuredis an elevation of the shuttle and feederdriving ,mechanism, which comprises parts of the needle-bar operating shaft above, the' s'huttle operating shaft and the feeder operating'shaft below and the parts connecting them Fig.2 is a rear view of the same, and Fig-e is a diagram, which will be referred to later'on- Fig.4 is a vertical section through the standard of a sewing machine showing theparts described assembledand Fig. 5 is a horizontal section on line A-A of Fig. 4.

similar parts throughout the several views.

The needle-bar operatin shaft 1 is mount ed to turn'in the arm of the machine and is provided with a crank 2, which is pivotally connected with a short offset connectin lever 3. A pin 14. is fastened in the standard of the machine, of which only parts 22, 22 are shown. A block 24 is mounted on the pin 14 to rock and engages in a lon itudinal slot of the connecting rod 3, so that the latter swings Similar characters of reference refer to about the pin 14 and slides on the block 24..

An intermediate shaft 10 parallel to the up per shaft 1 is mounted to turn in two suitable projections 11, 11 of the standard or in their equivalents. It has fastened on it a radially slotted crank 9 and a crank disk 8 without and a cam 21 within the two projections 11, 11. The lower end of the connecting rod 3 is provided with a pin 25, on which a block 26 is mounted to turn. This block engages in the radial slot of the crank 9 and serves for driving the intermediate shaft 10 in a direction opposite that of the upper shaft 1 and at a varying speed. Another pin 15 is fastened in the standard of the machine and a block 27 is mounted on this pin 15 to rock. A second connecting rod 13 is connected with the pin 12 of the crank disk 8 and is provided with a longitudinal slot, in which the block 27 engages. Consequently the connecting rod 13 will rock around the pin 15 and slide on the block 27. The lower end of the lever 13 is provided with a pin 28, on which a block 4 is mounted to turn. This block 4 engages in the radial slot 5 of the usual crank 6 on the a lever 20 within and an adjusting screw with the knob without. The lever 20 is provided with a radial slot '30, in which a roller 19 is adapted to move. 19 serves for supporting a two-armed lever 16 by means of the pin 31, on which the lever 16 can turn. The upper arm of the lever 16 is forked and is provided with broad jaws, which work with the triangular cam 21.

l The lower arm of the lever 16 is'bent and is This roller 1 ascertain by measuring the length of the the arm 17.

pivotally connected with an arm U on the feeder operating shaft 18.' It wiil be seen that the lever 16 will be given a suitable motion for rocking the feeder operating shaft 18 and that the adjusting arm without the standard can be shifted for vertically ad justing the lever 16 by means of the roller 19 and thereby adjusting the amount of the feed. When the slot 30 has a horizontal position, the roller 19 will be moved to and fro in a horizontal plane, so that the feeding shaft 18 is not actuated. If the slot is set in an oblique position by the adjusting screw of the lever 20 the roller 19 receives an upward and downward movement when rocked by the lever 16. The latter is thereforecompelled to follow that up and down movement and rocks the feeding shaft 18 by means of The diagram in Fig. 3 shows the operation of the device and is constructed as follows VV ith the radius of the crank2 a circle a around the center A is described, which circle is divided into a number (here 8) of like parts. From the points of division 1, 2, 3, 4, 5, 6, 7 and 8 straight lines are drawn through the point 14 (corresponding to the stationary pin 14) and by measuring the length of the connecting rod 3 by compasses the points 1, 2, 3, 4, 5, 6, 7 and 8 will be found. A curve 6 connecting these points will represent the path of the pin 25 during one revolution of the intermediate shaft 10, the center B being at the same distance from the center A, as the two shafts 1 and 10. Describe a circle 0 around the center B with the radius of the crank pin 12 and draw straight lines from the center B connecting the points 1, 2, 3, 4, 5, 6, 7 and 8 to the circle 0. The points of the circle 0 diametrically opposed to the pointsl, 2, 3, 4, 5, 6, 7 and 8 are the points 1", 2", 3", 4", 5", 6, 7 and 8. The reason for this construction is the fact that the crank pin 12 is set at an angle of 180 to the slotted crank 9. Draw from the points 1", 2, 3", 4, 5", 6", 7" and 8 straight lines through the point 15 (corresponding to the stationary pin 15) and connecting rod 13 by compasses the points 1H! 11/, 3/1! 4/) 5/, 11/, d 81/!- A curve (1 connecting these points will be the path of the pin 28. Set the point C at the same distance from the center B as the distance between the two shafts 10 and 7, described around the point C as a center a circle a through the most distant point 4, and draw straight lines from the center C through the points 1', 2, 3, 4', 5', 6, 7 and 8 to the circle 0 dividing the latiIl ll/II, gill/y g/lll, 4////, 5////, 7 and 8. Then for the positions 1, 2, 3, 4, 5, 6, 7 and 8 of the crank 2 the correspond ing positions of the crank 6 will be marked 7 and 8, and it will be seen, that the shuttle operating shaft 7 will rotate in the same direction as the needle bar operating shaft 1, further that the; maximum of speed of the shuttle will be at the point 8, and that the minimum of speed will be, at the Point 4 v 1 Evidently byvarying the angle between the crank pin 12 and the crank 9 and by 'varying the lengths of the two connecting canbe varied 1. In a shuttle-driving mechanism for sewing machines, the combination with a needle-bar-operating shaft having a crank and journaled in the arm of the machine, of a shuttle-operating shaft journa'led in the base of the machine and provided with a slotted crank, an intermediate shaft journaled in the standard of the machine and provided with. a slotted crank and a crank set, at an angle thereto, a connecting rod pivot- .ally connected with the crank of said needle bar-operating shaft and provided with a slot and adapted to engage withits other end the slotted crank of said intermediate shaft, a pin fastened in the standard of the machine and adapted to engage in the slot of said connecting rod for guiding the latter, a second connecting rod pivotally connected with the crank of said intermediateshaft and provided with a slot, and adapted to engage with its other end the slotted crank of said shuttle-operating shaft, and a second pin fastened in the standard of the machine and adapted to engage in the slot of said second connecting rod for guiding the latter.

2. In a shuttle-driving mechanism for sewing machines, the combination witha needlebar-operating shaft having a crank and journaled in the arm of the machine, of a shuttleoperating shaft journaled in the base of the s I machine and provided with a slotted crank, an intermediate shaft journaled in the standard of the machine and provided with a slotted crank and a crank set at an angle thereto, a connecting rod pivotally connected with the crank of said needle-bar-operating shaft and provided with a longitudinal slot and with a pin at the other end, a part mounted to turn on the pin ofsaid connecting rod and adapted to engage in the slotted crank of said intermediate shaft, a stationary pin fastened in the standard of the machine, a part mounted to rock on said stationary pin and adapted to engage in the'longitudinal slot of said connecting rod for guiding the latter. a

tionary pin fastened in the standard of the machine and adapted to engage in the longitudinal slot of said second connecting rod for guiding the latter.

3. In a shuttleand feeder-driving mechanism for sewing machines, the combination with a needle-bar-operating shaft having a crank and journaled in the arm of the machine, of a shuttle-operating shaft .journaled in the base of the machine and provided with a slotted crank, an intermediate shaft journaled in the standard. of the machine and pro vided with a slotted crank and a crank set at an angle thereto and also with a cam, a connecting rod pivotally connectedwith the crank of said needle-bar-operating shaft and provided with a slot and adapted to engage with its other end the slotted crank of said intermediate shaft, a pin fastened in the standard of the machine and adapted to engage in the slot of said connecting rod for guiding the latter, a second connecting rod pivotally connected with the crank of said intermediateshaft and provided with a slot and adapted to engage with its other end the slotted crank of said shuttle-operating shaft, a second pin fastened 'in the standard of the machine and adapted to engage in the slot of said second connecting rod for guiding the latter, a feed eroperating shaft mounted to turn in the base of the machine and provided withan arm, a forked lever pivotally connected with the arm of said feeder-operating shaft and ad apted to Work with the cam of said intermediate shaft and provided between its two ends with a pin, and means for vertically adjusting and horizontally guiding the pin of said forked ever.

4. In a shuttleand feeder-driving mechanism for sewing machines, the combination with a needle-bar-operating shaft having a crank and journaled in the arm of the machine, of a shuttle-operating shaft journaled in the base of the machine and provided with a slotted crank, an intermediate shaft journaled in the standard of the machine and provided with a slotted crank and a crank set at an angle thereto and also with a cam, a connectin rod pivotally connected with the crank of said needle-bar-operating shaft and provided with a] ongitudinal slot and with a pin at the other end, a part mounted to turn on the'pin of said connecting rod and adapted to engage in the slotted crank of said intermediate sh aft, a stationary pin fastened in the standard of the machine, a part mounted to rock on said stationary pin and adapted to engage in the longitudinal slot of said connecting rod for guiding the latter, a second connecting rod pivotally connected with the crank of said intermediate shaft and provided with a longitudinal slot and with a pin at the other end, a part mounted to turn on the pin of said second connecting rod and adapted to engage in the slotted crank of said shuttleoperating shaft, a second stationary pin fastened in the standard of the machine and adapted to engage in the longitudinal slot of said second connecting rod for guiding the latter, a feeder-operating shaft mounted to turn in the base of the machine and provided with an arm, a forked lever pivotally connected with the arm of said feeder-operating shaft and adapted to work with the cam of said intermediate shaft and provided between its two ends with a pin, and means for vertically adjusting and horizontally guiding the pin of said forked lever.

I-IERMANN KOHLER.

Witnesses WILHELM KI'JMPEL, PAUL TEICHMANN. 

